package com.daichi.config;

import com.daichi.security.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.method.configuration.EnableGlobalMethodSecurity;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.config.http.SessionCreationPolicy;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;

@Configuration
@EnableWebSecurity
@EnableGlobalMethodSecurity(prePostEnabled = true)
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    private final LoginFailureHandler loginFailureHandler;

    private final LoginSuccessHandler loginSuccessHandler;

    private final CaptchaFilter captchaFilter;

    private final JwtAuthenticationEntryPoint jwtAuthenticationEntryPoint;

    private final JwtAccessDeniedHandler jwtAccessDeniedHandler;

    private final UserDetailsService userDetailsService;

    private final JwtLogoutSuccessHandler jwtLogoutSuccessHandler;

    private final static String[] URL_WHITELIST = {
            "/login",
            "/logout",
            "/captcha",
            "/favicon.ico",
    };

    @Autowired
    public SecurityConfig(LoginFailureHandler loginFailureHandler,
                          LoginSuccessHandler loginSuccessHandler,
                          CaptchaFilter captchaFilter,
                          JwtAuthenticationEntryPoint jwtAuthenticationEntryPoint,
                          JwtAccessDeniedHandler jwtAccessDeniedHandler,
                          UserDetailsService userDetailsService,
                          JwtLogoutSuccessHandler jwtLogoutSuccessHandler) {
        this.loginFailureHandler = loginFailureHandler;
        this.loginSuccessHandler = loginSuccessHandler;
        this.captchaFilter = captchaFilter;
        this.jwtAuthenticationEntryPoint = jwtAuthenticationEntryPoint;
        this.jwtAccessDeniedHandler = jwtAccessDeniedHandler;
        this.userDetailsService = userDetailsService;
        this.jwtLogoutSuccessHandler = jwtLogoutSuccessHandler;
    }

    @Bean
    public JwtAuthenticationFilter jwtAuthenticationFilter() throws Exception {
        JwtAuthenticationFilter jwtAuthenticationFilter = new JwtAuthenticationFilter(authenticationManager());
        return jwtAuthenticationFilter;
    }

    @Bean
    public BCryptPasswordEncoder bCryptPasswordEncoder() {
        return new BCryptPasswordEncoder();
    }

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
                // 允许跨域
                .cors().and().csrf().disable()
                // 登录配置
                .formLogin()
                .successHandler(loginSuccessHandler)
                .failureHandler(loginFailureHandler)
                // 退出配置
                .and()
                .logout()
                .logoutSuccessHandler(jwtLogoutSuccessHandler)
                // 禁用session
                .and()
                .sessionManagement()
                .sessionCreationPolicy(SessionCreationPolicy.STATELESS)
                // 配置拦截规则
                .and()
                .authorizeRequests()
                .antMatchers(URL_WHITELIST).permitAll()
                .anyRequest().authenticated()
                // 异常处理器
                .and()
                .exceptionHandling()
                .authenticationEntryPoint(jwtAuthenticationEntryPoint)
                .accessDeniedHandler(jwtAccessDeniedHandler)
                // 配置自定义的过滤器
                .and()
                .addFilter(jwtAuthenticationFilter())
                .addFilterBefore(captchaFilter, UsernamePasswordAuthenticationFilter.class)
        ;

    }

    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.userDetailsService(userDetailsService);
    }
}
